Improvement in air-blast regulators for thrashing-machines



J. HUNSINGEB.. y Air-Blast Regulator for Thrashing-Maohines, 8mo.

WITNESSES: y INVBNTOR: g4@ 17; MWA c// v Y I ATTORNEYS.

NAETERS. PHOTO-LITHOGRAPHER, WASHINGTDN, D. Cv

raton.

JACOB HUNSINGER, OF METAMORA, INDIANA.

IMPROVEMENT IN AlR-BLAST REGULATORS FOR THRASHING-MACHINES, &c.

Specification forming part of Letters Patent No. 212,004, dated February4, 1879; application filed October 16, 1878. l

To all whom it may concern:

Be it known that I, J Aeon HUNsINGER, of Metamora, in the county ofFranklin and State of Indiana, have invented a new and ImprovedAir-Blast Regulator for Thrashing- Machines and Fan-Mills, of which thefollowing is a specification:

The object of my invention is to furnish a device for regulating theblast of air from the blower in machines for separating grain from strawor chaff, whereby the riddles may be kept clear of straw at all times,whether the thrasher is running at high or low speed, and the waste ofgrain which occurs by variations in the blast may be avoided.

In the drawings, Figure l is an elevation of one side of a fan-blowercase with my regulating apparatus applied thereto, and Fig. 2 isavertical section of the same.

Similar letters of reference indicate corresponding parts.

a represents the case of a fan-blower, con-` nected with athrashing-machine, or a machine of a similar character, (not shown,) inthe usual manner; and b b are openings in the side of a for theadmission of air. c is the fan, which is driven by a pulley (not shown)on the fan-shaft d; and e e are vertical posts across the openings b b,forming bearings for the shaft d. f j' are swinging valves or gates,seniicircular in forni, connected by pivot-pins g to the side of thecase a, adjacent to the openings b.

There are two of the valves f at each opening b, and when closed theyrest against the post-s e and cover the openings b.

h 7L are vert-ical posts upon the top of the case a, supporting thehorizontal levers t' fi, which are connected at their inner ends overthe center of case a to a plate, lf, forming a togglejoint.

The posts 7L are the fulcrums of levers t', and the outer end of eachlever i projects beyond the side of the case a, and is connected to apitman, l. m m are links, attached to the valves f f and to the pitman lat each side of the blower-case. a is a cylinder, supported above theblower-case a by the standards o 0, which are bolted to the case a. p isa hollow vertical shaft, passing through the cylinder n, and havingkeyed upon its lower end a pulley, q, and having its upper end formed asdiverging arms r 1', which arms r support the arms s of thegovernor-balls t. The inner ends of the arms s pass into a mortise inthe stem u, which passes vertically through the shaft p, and has itslower end connected to the Vplate 7c of the levers i t'. These partsconstitute a centrifugal governor of the usual character. A

'v is a lever, fulcrumed at o on one of the standards o. Its inner endismortised or slotted, to take upon`the stem a below a collar, u; and theouter end of o carries an adjustable weight, w, secured in place by asetscrew, fw".

The shaft p of the governor is driven by a belt, y, from a pulley, y',on the shaft d of the fan-blower to the pulley q of the governor shaft.

a u are friction-pulleys, supported on the case a upon bearings t', and.the belt y passes over these pulleys u.

It will be seen that the speed of the governor is regulated by the speedof the thrash in g-machine to which the blower is connected, and thatthe positionof the valves f is regulated by the rise and fall of thegovernor balls t.

The increase of speed of the machine will raise the balls t, and, by thestem u, levers 1', pitmen Z, and links m, will close the valves j', toreduce the force of the blast, while a de crease of speed below thenormal point will act to open the valves f, and permit a greaterquantity of air to pass in to compensate for the loss of speed.

The weighted lever o acts to raise the stem u and reopen the valves fthe moment the speed is slackened, thereby assisting the acA tion of thegovernor.

I do not limit myself to t-he precise construe tion set forth.

The form of governor andthe connections of the valves therewith may bevaried without departing from my invention.

The levers fi might be connected to the standards 0 and the posts hdispensed with.

The inner ends of levers i may be jointed together in any desiredmanner.

Having thus described my invention, I claim latter connected Wit-h agovernor mechanism, as new and desire to secure by LettersPatsubstantially as shown and described'. enti The combination, withblower c d and box JACOB HUNSINGER' a, having apertures b b, of thevalves ff, the Vitnesses: vertical posts e, in which the blower is jour-ISAAC WEIR, naled, the links m on, and the pitmzm C, the JOHN H.ALLISON.

